(Essay found in Nesselroade & Grimm, 2019; pg. 138) Is he taller than he is heavy? This question, at first glance, seems to be nonsensical; like comparing apples with oranges. The reason the question appears to be unanswerable is that height and weight are different variables and measured in different units. How can we say that 6 ft 2 in. is more or less than 145 lb? However, in the world of statistics we can compare the relative position of scores in different distributions by using standardized scores. The z score transformation will convert original scores, from different scales, to